Your search for "basic grass energy - 21" revealed the following:
Basic Grass Energy (Japanese) - 09 - Promo (Chikorita Half Deck) from Intro Pack Neo Promos, available at 401 Games Canada. Rarity: Promo Finish: Holofoil
Basic Grass Energy (Japanese) - 03 - Promo (Chikorita Half Deck) from Intro Pack Neo Promos, available at 401 Games Canada. Rarity: Promo Finish: Holofoil
Grass Energy - 162/165 - Common from Expedition, available at 401 Games Canada. Rarity: Common Finish: Normal
Basic Grass Energy (Japanese) - 25 - Promo (Bulbasaur Deck VHS) from Intro Pack Promos, available at 401 Games Canada. Rarity: Promo Finish: Normal
Basic Grass Energy (Japanese) - 36 - Promo (Bulbasaur Deck VHS) from Intro Pack Promos, available at 401 Games Canada. Rarity: Promo Finish: Normal
Basic Grass Energy (Japanese) - 08 - Promo (Bulbasaur Deck VHS) from Intro Pack Promos, available at 401 Games Canada. Rarity: Promo Finish: Normal
Grass Energy - 129/132 - Common - 1st Edition from Gym Heroes 1st Edition, available at 401 Games Canada. Rarity: Common Finish: Normal Artist: Keiji Kinebuchi
Basic Grass Energy (Japanese) - 04 - Promo (Chikorita Half Deck) from Intro Pack Neo Promos, available at 401 Games Canada. Rarity: Promo Finish: Normal
Grass Energy - 104/109 - Common from Ex Ruby & Sapphire, available at 401 Games Canada. Rarity: Common Finish: Normal
Grass Energy - 91/108 - Common - Reverse Holo from XY: Evolutions, available at 401 Games Canada. Rarity: Common Finish: Reverse Holo
Grass Energy - 129/132 - Common - 1st Edition from Gym Challenge 1st Edition, available at 401 Games Canada. Rarity: Common Finish: Normal Artist: Keiji Kinebuchi
Grass Energy - 129/132 - Common - Unlimited from Gym Heroes Unlimited, available at 401 Games Canada. Rarity: Common Finish: Normal Artist: Keiji Kinebuchi
Grass Energy - 167/145 - Secret Rare from Sun & Moon: Guardians Rising, available at 401 Games Canada. Rarity: Secret Rare Finish: Holofoil
Grass Energy (Japanese) - 1 - No Rarity from S8a: 25th Anniversary Collection, available at 401 Games Canada. Rarity: No Rarity Finish: Holofoil
Grass Energy - 101/106 - Holo Rare from Ex Emerald, available at 401 Games Canada. Rarity: Holo Rare Finish: Holofoil
Grass Energy - 104/109 - Common - Theme Deck Exclusive from Pokemon Theme Deck Exclusives, available at 401 Games Canada. Rarity: Common Finish: Normal
Grass Energy (Japanese) - 1 - No Rarity from S8b: VMAX Climax, available at 401 Games Canada. Rarity: No Rarity Finish: Normal
Grass Energy (Japanese) - 251/172 - No Rarity from S12a: VSTAR Universe, available at 401 Games Canada. Rarity: No Rarity Finish: Holofoil
Grass Energy - 104/109 - Promo (Professor Program 2004-05) from Pokemon Professor Program Promos, available at 401 Games Canada. Rarity: Promo Finish: Normal
Grass Energy - 2011-2013 Holo Promo from Pokemon Theme Deck Exclusives, available at 401 Games Canada. Rarity: Promo Finish: Holofoil Card Text:Unnumbered with 2013 copyright date.
Grass Energy (Japanese) - E04 - Common from Expansion Pack, available at 401 Games Canada. Rarity: Common Finish: Normal
Grass Energy (Japanese) - VS Series - Unlimited from Pokemon VS Series, available at 401 Games Canada. Rarity: Common Finish: Normal
Grass Energy (Japanese) Galaxy Holo Promo from Japanese McDonald's e-Pack Promos, available at 401 Games Canada. Rarity: Promo Finish: Holofoil Artist: Basic Grass Energy
Grass Energy - 104/109 - Common - Reverse Holo from Ex Ruby & Sapphire, available at 401 Games Canada. Rarity: Common Finish: Reverse Holo
Grass Energy (Texture Full Art) - 152/159 - Ultra Rare from Sword & Shield: Crown Zenith, available at 401 Games Canada. Rarity: Ultra Rare Finish: Holofoil
Grass Energy (Japanese) Non-Holo Promo is available at 401 Games Canada! You can find lots of other Pokemon Singles products as well as more great items from Pokemon Japanese McDonald's e-Pack Promos!
Grass Energy - 283/264 - Secret Rare from Sword & Shield: Fusion Strike, available at 401 Games Canada. Rarity: Secret Rare Finish: Holofoil
Grass Energy - Play! Promo (2011) from Pokemon League & Championship Promos, available at 401 Games Canada. Rarity: Promo Finish: Holofoil Card Text:Crosshatch Foiling; Copyright Date: 2011 Pokémon/Nintendo
Grass Energy - 2017 - Shining Legends - Reverse Holo from Sun & Moon (Base Set), available at 401 Games Canada. Rarity: Common Finish: Reverse Holo
Grass Energy - Starfoil Promo (WOTC League) from Pokemon League & Championship Promos, available at 401 Games Canada. Rarity: Promo Finish: Holofoil
Grass Energy - Play! Promo (2010) from Pokemon League & Championship Promos, available at 401 Games Canada. Rarity: Promo Finish: Holofoil Card Text:Crosshatch Foiling; Copyright Date: 2010 Pokémon/Nintendo
Grass Energy (Japanese) - 099/071 - Ultra Rare from SV2D: Clay Burst, available at 401 Games Canada. Rarity: Ultra Rare Finish: Holofoil
Grass Energy (Japanese) - 128/100 - Ultra Rare from S8: Fusion Arts, available at 401 Games Canada. Rarity: Ultra Rare Finish: Holofoil
Grass Energy - League Promo (2011) from Pokemon League & Championship Promos, available at 401 Games Canada. Rarity: Promo Finish: Holofoil Card Text:Crosshatch Foiling; Copyright Date: 2011 Pokémon/Nintendo
Grass Energy - 88/95 - Play Pokemon! Promo from Pokemon League & Championship Promos, available at 401 Games Canada. Rarity: Promo Finish: Holofoil Card Text:Crosshatch Foiling
Bulbasaur - 39/95 - Common - Reverse Holo from Ex Team Magma vs Team Aqua, available at 401 Games Canada. Rarity: Common Finish: Reverse Holo Artist: Ken Sugimori Card Text:[1] GrowthAttach a Grass Energy card from your hand to Bulbasaur.[G]...